Their initial calculations and scale-model wind-tunnel experiments convinced them they wouldn't need a strong wind to lift the 33.5-tonne column.

他们最初的计算和风洞比例模型实验使他们确信，不需要强风就能提起33.5吨的柱子。

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As these experiments show, begging apparently provides a signal of need that parents use to make judgments about which offspring can benefit most from a feeding.

正如这些实验所显示的，乞求显然提供了一种需要的信号，父母可以利用这种信号来判断哪些孩子能从喂食中获益最多。

youdao

To understand their experiments, we first need a crash course in genes and embryos.I'll try to make it quick.

为了理解他们的试验，我们首先需要一堂在基因和胚胎方面的速成课，我将试着很快对此作一阐述。

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MIT has undertaken a variety of experiments in Educational technology. But we really feel at this Point of time we need some sort of coordinate strategy.

麻省理工做了许多不同的,教育技术的实验，但我们觉得,现在我们需要一些协调的战略。

麻省理工公开课 - 媒体、教育、市场课程节选

I mean, it's a pity we can't kill people in experiments deliberately anymore, because we need to see how this works, but I can't do it.

我的意思是,很可惜我们不能在试验中故意杀人,只为了搞清其中的原理,我们不能那么做

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